Xenogryllus lamottei Robillard, 2019

Jaiswara, Ranjana, Dong, Jiajia, Ma, Libin, Yin, Haisheng & Robillard, Tony, 2019, Taxonomic revision of the genus Xenogryllus Bolívar, 1890 (Orthoptera, Gryllidae, Eneopterinae, Xenogryllini), Zootaxa 4545 (3), pp. 301-338 : 312-315

Xenogryllus lamottei Robillard n. sp.

( Figs 1 H–I, 3C–D, 4B, 5B, 7D–E, 8C)

Type material. Holotype, ♂, Guinea: Simandou [Mount], Guinée [Guinea], Cpt.[camp] Fon Yenfédou , Ifan [Institut Français d’Afrique Noire], ix.1951, [M.] Lamotte (MNHN-EO-ENSIF10685).

Type locality. Mount Simandou , Guinea .

Distribution. Species only known from the type locality in Guinea.

Etymology. The species is dedicated to the great French entomologist Marcel Lamotte who collected the type specimen. Diagnosis. Species of average size, characterized by male FWs not widened as in other species of the genus; general morphology differing from the other African species ( X. eneopteroides , X. mozambicus n. sp. and X. maniema n. sp.) and more similar to the Asian species ( X. marmoratus , X. transversus , X. ululiu and X. maichauensis ) by the following characters: pronotum not carinated laterally ( Fig. 3D ); wrinkles on surface of male FWs weak; eyes small, restricted to dorsal quarter of head (reaching ½ of head in other African species); face almost flat in lateral view; male genitalia with short pseudepiphallic lophi ( Fig. 8C ), close to that of X. ululiu ( Fig. 8H ), their apex short and bifid, with a pre-apical dorsal hook-like expansion (absent in other African species); ectophallic fold and latero-ventral expansions shorter than in other species.

Description. In addition to the characters of the genus, species of average size ( Fig. 1 H–I), coloration gray brown little contrasted. Fastigium longer than wide, thinner than in other species ( Fig.4B ), slightly widened apically. Face almost flat in lateral view ( Fig. 3D ), with typical pale mask with black spots underlined by a thick black line below eyes ( Fig. 3C ); mandibles dark brown; clypeus and labrum mottled with yellow and dark brown; maxillary palpi dark brown. Scapes and first article of antennae dark brown, flagellum light brown. Eyes rounded and restricted to posterior quarter of head in lateral view. Pronotum dorsal disc not carinated laterally ( Fig. 3D ), brown, with lateral margins underlined by a yellow line, with a median dark brown band, ticker posteriorly; posterior margin almost straight. FIII narrow, ended by a long linear region. Abdomen slightly shorter than FWs. Cerci dark brown.

Male. FWs as wide as abdomen ( Fig. 5B ), not widened as in other species of the genus; light brown, translucent, with weak wrinkles on surface. Dark coloration anterior to 1A not including angle of file. CuP visible posteriorly until angle of 1A. Angle of 1A straight. Harp wide, with two straight parallel oblique veins and a partial one, straight and reaching harp mid-length. Cell c1 not narrowed posteriorly. Mirror almost rounded, its inner limit forming a curve; underlined posteriorly by cells e1 and d2 fused together. Apical field forming a narrow triangle made of four cell alignments (E–H). CuA thin and brown; M thick, whitish; R and Sc almost fused, brown; M-R area dark mostly brown, its dorsal margin whitish; lateral field translucent brown crossed by 22 banches of Sc.

Male genitalia ( Fig. 7 D–E): Pseudepiphallic lophi forming a short rectangle posterior to wide base of pseudepiphallic sclerite; lophi ( Fig. 8C ) with a narrow membranous inner margin, setose basally; apex with a black hook-like inner dorsal expansion; sclerotized ventral blades of lophi with longitudinal wrinkles as in X. transversus and X. ululiu , but without strong ventral carina as in X. eneopteroides and X. mozambicus . Pseudepiphallic lateral membranous lobes small. Pseudephiphallic basal margin reinforcement weak. Rami thin and straight, their apex narrowed but not hooked innerly. Pseudepiphallic parameres ventral plate r-shaped. Ectophallic arc not sclerotized. Ectophallic apodemes thin and divergent. Ectophallic fold and latero-dorsal expansions short. Endophallic sclerite and apodeme little differentiated.

Female: Unknown.

Life history traits. Unknown.

Calling song. Unknown.

Measurements. See Table 3.

Figures

FIGURE 1. (A–C) Xenogryllus eneopteroides: male in dorsal (A) and lateral (B) views, female in dorsal view (C); (D–G) Xenogryllus marmoratus: male in dorsal (D) and lateral (E) views, female in dorsal (F) and lateral (G) views; (H–I) Xenogryllus lamottei n. sp.: male holotype in dorsal (H) and lateral (I) views; (J–K) Xenogryllus maniema n. sp.: male paratype in dorsal (J) and lateral (K) views; (L–O) Xenogryllus maichauensis: male in dorsal (L) and lateral (M) views, female in dorsal (N) and lateral (O) views. Scale bar: 1 cm.

FIGURE 3. Heads of Xenogryllus in facial (left panel) and lateral views (right panel): (A–B) Xenogryllus eneopteroides; (C–D) Xenogryllus lamottei n. sp.; (E–F) Xenogryllus maichauensis; (G–H) Xenogryllus maniema n. sp.; (I–J) Xenogryllus marmoratus. (K–L); Xenogryllus mozambicus n. sp.; (M–N) Xenogryllus ululiu; (O–P) Xenogryllus transversus. Scale bar: 1 mm.

FIGURE 4. Heads of Xenogryllus in dorsal views: (A) Xenogryllus eneopteroides; (B) Xenogryllus lamottei n. sp.; (C) Xenogryllus maichauensis; (D) Xenogryllus maniema n. sp.; (E) Xenogryllus marmoratus; (F) Xenogryllus transversus; (G) Xenogryllus ululiu; (H) Xenogryllus mozambicus n. sp. Scale bar: 1 mm.

FIGURE 5. Male FW venation in dorsal view: (A) Xenogryllus eneopteroides; (B) Xenogryllus lamottei n. sp.; (C) Xenogryllus maichauensis; (D) Xenogryllus maniema n. sp.; (E) Xenogryllus marmoratus; (F) Xenogryllus mozambicus n. sp.; (G) Xenogryllus transversus; (H) Xenogryllus ululiu. Scale bar: 5 mm.

FIGURE 7. Male genitalia: (A–C) Xenogryllus eneopteroides, dorsal (A), ventral (B) and lateral (C) views; (D–E) Xenogryllus lamottei n. sp., ventral (D), lateral (E) views; (F–G) Xenogryllus maniema n. sp., ventral (F), lateral (G) views; (H–I) Xenogryllus marmoratus, ventral (H), lateral (I) views; (J–K) Xenogryllus mozambicus n. sp., ventral (J), lateral (K) views; (L– N) Xenogryllus maichauensis, pseudepiphallic lophi in ventral (L–M) and lateral (N) views, male from South China (L), male from Thailand (M, N); (O–P) Xenogryllus transversus, dorsal (O), ventral (P) views; (Q–R) Xenogryllus ululiu, pseudepiphallic lophi in dorsal (Q) and ventral (R) views. Scale bar: 1 mm.

FIGURE 8. Right pseudepiphallic lophi of male genitalia in dorsal view: (A–B) Xenogryllus eneopteroides, male from Central African Republic (A), male from Ivory Coast (B); (C) Xenogryllus lamottei n. sp.; (D) Xenogryllus maichauensis; (E) Xenogryllus maniema n. sp.; (F) Xenogryllus mozambicus n. sp.; (G) Xenogryllus marmoratus; (H) Xenogryllus ululiu; (I) Xenogryllus transversus. Symbols: Preapical hook-like expansion figured in gray or with a black arrow; dotted parts represent membranous areas; thin lines represent folds and reliefs in sclerites. Scale bar: 1 mm.